/// <summary>
/// Writes an FBX document to the stream
/// </summary>
/// <param name="document"></param>
/// <remarks>
/// ASCII FBX files have no header or footer, so you can call this multiple times
/// </remarks>
public void Write(FbxDocument document)
{
if (document == null)
{
throw new ArgumentNullException(nameof(document));
}
var sb = new StringBuilder();
// Write version header (a comment, but required for many importers)
var vMajor = (int)document.Version / 1000;
var vMinor = ((int)document.Version % 1000) / 100;
var vRev = ((int)document.Version % 100) / 10;
sb.Append($"; FBX {vMajor}.{vMinor}.{vRev} project file\n\n");
nodePath.Clear();
foreach (var n in document.Nodes)
{
if (n == null)
{
continue;
}
BuildString(n, sb, document.Version >= FbxVersion.v7_1);
sb.Append('\n');
}
var b = Encoding.ASCII.GetBytes(sb.ToString());
stream.Write(b, 0, b.Length);
}
/// <summary>
/// Reads an FBX document from the stream
/// </summary>
/// <returns>The top-level node</returns>
/// <exception cref="FbxException">The FBX data was malformed
/// for the reader's error level</exception>
public FbxDocument Read()
{
// Read header
bool validHeader = ReadHeader(stream.BaseStream);
if (errorLevel >= ErrorLevel.Strict && !validHeader)
{
throw new FbxException(stream.BaseStream.Position,
"Invalid header string");
}
var document = new FbxDocument {
Version = (FbxVersion)stream.ReadInt32()
};
// Read nodes
var dataPos = stream.BaseStream.Position;
FbxNode nested;
do
{
nested = ReadNode((int)document.Version);
if (nested != null)
{
document.Nodes.Add(nested);
}
} while (nested != null);
// Read footer code
var footerCode = new byte[footerCodeSize];
stream.BaseStream.Read(footerCode, 0, footerCode.Length);
if (errorLevel >= ErrorLevel.Strict)
{
var validCode = GenerateFooterCode(document);
if (!CheckEqual(footerCode, validCode))
{
throw new FbxException(stream.BaseStream.Position - footerCodeSize,
"Incorrect footer code");
}
}
// Read footer extension
dataPos = stream.BaseStream.Position;
var validFooterExtension = CheckFooter(stream, document.Version);
if (errorLevel >= ErrorLevel.Strict && !validFooterExtension)
{
throw new FbxException(dataPos, "Invalid footer");
}
return(document);
}
/// <summary>
/// Writes an FBX file to the output
/// </summary>
/// <param name="document"></param>
public void Write(FbxDocument document)
{
stream.BaseStream.Position = 0;
WriteHeader(stream.BaseStream);
stream.Write((int)document.Version);
// TODO: Do we write a top level node or not? Maybe check the version?
nodePath.Clear();
foreach (var node in document.Nodes)
{
WriteNode(node);
}
WriteNode(null);
stream.Write(GenerateFooterCode(document));
WriteFooter(stream, (int)document.Version);
output.Write(memory.GetBuffer(), 0, (int)memory.Position);
}
/// <summary>
/// Reads a full document from the stream
/// </summary>
/// <returns>The complete document object</returns>
public FbxDocument Read()
{
var ret = new FbxDocument();
// Read version string
const string versionString = @"; FBX (\d)\.(\d)\.(\d) project file";
char c;
while (char.IsWhiteSpace(c = ReadChar()) && !endStream)
{
} // Skip whitespace
bool hasVersionString = false;
if (c == ';')
{
var sb = new StringBuilder();
do
{
sb.Append(c);
} while (!IsLineEnd(c = ReadChar()) && !endStream);
var match = Regex.Match(sb.ToString(), versionString);
hasVersionString = match.Success;
if (hasVersionString)
{
ret.Version = (FbxVersion)(
int.Parse(match.Groups[1].Value) * 1000 +
int.Parse(match.Groups[2].Value) * 100 +
int.Parse(match.Groups[3].Value) * 10
);
}
}
if (!hasVersionString && errorLevel >= ErrorLevel.Strict)
{
throw new FbxException(line, column,
"Invalid version string; first line must match \"" + versionString + "\"");
}
FbxNode node;
while ((node = ReadNode()) != null)
{
ret.Nodes.Add(node);
}
return(ret);
}
